Cheap flights from Montreal to the United Kingdom from C$ 305

If you aren’t able to travel during the month of September, then book flights to United Kingdom from Montreal during May instead. Flights to United Kingdom in May, while not as cheap as those in September, still average around C$ 931.

According to our data, Saturday is the cheapest day to fly to United Kingdom from Montreal. The lowest ticket price found for a Saturday departure recently was C$ 1,116. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Montreal to United Kingdom on a Friday will generally be more expensive and average around C$ 1,154. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the afternoon is the cheapest time of day to fly from Montreal to United Kingdom when you can find flight prices for as low as C$ 1,136. Flying to United Kingdom in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to United Kingdom is in the evening when prices are around C$ 1,148.

Fly from Montreal Pierre Elliott Trudeau Intl to London Gatwick for the best Montreal - United Kingdom flight prices

You are more likely to see cheaper flights to United Kingdom from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around C$ 1,060 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Montreal for as low as C$ 921 on momondo.

There are 3 cabin classes available to choose from on Montreal to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

WestJet, Porter Airlines, and TAP AIR PORTUGAL are the most popular carriers operating from Montreal to United Kingdom

Air Canada, British Airways and Air Transat are the top three most popular airlines that fly to United Kingdom from Montreal according to our data. Air Canada is the first choice among our users, with 49% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 10 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between Montreal and United Kingdom have experienced a delay on any given week. The average delay length over the past 12 months has been 155 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Thursday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Air Transat has had the least delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

As of June 2026, 20 flights take off from Montreal and land in United Kingdom each day. The most common flight departure time for this route is 10:00p.m., with 100% of daily flights taking off in the evening.

The number of flights available between Montreal and United Kingdom is 142 per week as of June 2026. The most frequent departure day is Sat, with 20% of weekly flights leaving on this day.